This is a format for storing graphical information, created in the CorelDRAW program. It can contain raster and vector images. It’s used exclusively in vector editors from the Corel company. For use in third-party software it’s necessary to use converters. Version 10 and earlier can be opened in vector software from Adobe. CDR can be opened also with the help of Inkscape and sK1 programs.
was developed for the first mass-produced e-book reader – Rocket eBook. The format is written in Ruby. RB files are containers holding the entire content for a Rocket eBook device. It has DRM protection capability which is not used in the books published at present due to the format’s lack of popularity.